US2565368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal-combustion engine
Assignee: Individual
•
Filing: 1948-11-15
•
Granted: 1951-08-21
•
Expires: 1968-11-15
Abstract
No abstract record available.
Inventors
- 👤 Hammick Frederick Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:03
CPC Classifications
F; F01; F01B; F01B7/00; F01B7/02; F01B7/14; F02; F02B; F02B41/00; F02B41/02; F02B41/04; F02B75/00; F02B75/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1237696A
Cited
US1263972A
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GB216209A
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US1781008A
Cited
US2117700A
Cited
US2336786A
Cited
US2354620A
Cited
US2359045A
Cited
US2345056A
Cited
US2456164A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-20 | 1955-02-19 | 1955-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-20 | 1959-02-19 | 1959-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-20 | 1963-02-19 | 1963-08-21 | $7700.00 | Window Closed / Lapsed |